Road-roller.



No. 660,203. Patented 'Oct. 23,1900. m. a. SCHINKE.

ROAD ROLLER.

(Application filed Mar. 8, 1897.)

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No. 660,203. Patented Oct. 23,0900. M, G. SCHINKE. ROAD ROLLER. (Application filed-Mar. 8, .1897.) (No Model.) 2 sheets-sheet 2. I

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UNITED STATES PATENT OFFICE.-

MAX G. SOHINKE, OF MILWAUKEE, WISCONSIN.

ROAD-ROLLER.

SPECIFICATION forming part of, Letters Patent No. 660,203, dated October 23, 1900.

Application filed March 8, 1897.

To all whom it may concern:

Be it known that I, MAX G. SCHINKE, of

Milwaukee, in the'county of Milwaukee and State of Wisconsin,have invented certain new and useful Improvements in Road-Rollers; and I do hereby declare that the following is a full, clear, and exact description of the inven tion,which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The main object of my invention is to increase the efficiency of a roller used to level, smooth, spread, or compact material and to combine a tamping action with the usual smoothing action of the roller.

It consists of certain novel features in the construction and arrangement of component parts of the device, as hereinafter particularly described, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts in the several figures.

Figure 1 is a side elevation of a roller embodying my invention, certain parts being broken away and shown in section. Fig. 2 is a horizontal section of a part of the roller on the line 2 2, Fig. 1; and Fig. 3 is a vertical section on the line 3 3, Fig. 1.

For the purpose of illustration I have shown and will specifically describe my improvements as adapted and applied to a street or land roller, although they may be applied to rollers for other purposes where a tamping action is desirable in connection with the usual smoothing and compressing action of the roller. For certain uses, as for streetwork,

the'roller may be mounted in a suitable frame.

Referring to the drawings, A designates the roller-frame, which may be constructed of wood, as shown, or of any other suitable material and of any desired shape. In the pres- 50 out instance it is shown as quadrangular in form. The roller may be made in one or more parts or sections, according to the use to which it is to be applied. In the present case it is shown as made of two parts or sections B B for facility in turning and operating it. Each part or section is made hollow, with a central hub or hearing I), which is mounted to turn on an axle C, fastened'at its ends to the sides of the frame A. The roller may be constructed of any suitable material, preferably of metal. In the present case each part is shown as cast in one piece, with an internal rack, teeth, or projections 1) arranged around its periphery concentrically with its hub b, which is formed integrally with one end, the other or outer end being left open. The two parts are mounted end to end upon the axle O and are held close together by collars c c, placed on said axle next to the outer ends of hubs b. Each roller-section B is provided with a tamping or compacting weight D, which in the present case is of cylindrical form and mounted to turn on an axis parallel with the axis of the roller. Each of these rolling weights is adapted to traverse or bear against the interior of the rim of the roller-section B in which it is contained and is carried or guided in its proper relation thereto by a horizontally-disposed frame or support E, which is pivotally connected by a pin or bolt 6 at its front end to a bracket or, depending from the side of frame A. At its opposite or rear end each support E is provided with a transverse rocking pin or shaft F, parallel with the pivot pin or bolt 6. This shaft is provided at one end with a depending dog f, adapted to engage with the inwardly-projecting teeth b of the roller, and at the opposite or outer end it is formed or provided with an upwardly-projecting arm f, connected with the support E by a spring f which tends to turn and hold the dog f toward the periphery of the roller in the path of the teeth I).

The rotary weight D, as shown, is formed or provided with an axle d, bearing at its ends in side pieces or brackets e e, which project downwardly from the sides of the support E; but it may be made to turn upon instead of with said axle. Each Weight D may be made of iron or other suitable material possessing 10o the requisite weight and provided on its periphery with a covering of elastic or non-resonant material. This covering may be constructed of wooden staves bolted to the flanged ends of the weight, as shown. At each end of the roller or at the outer end of each part or section thereof a lever G is fulcruined to the frame within convenient reach of the driver or operator. A sliding plate or bar H, mounted on the frame A and held and guided thereon by suitable keepers, engages at one end with said lever and at the opposite or rear end with the arm f, as shownin Fig. 2. Each lever is provided with a springlatch adapted to engage with the notches in a sector 9, attached to the frame. By means of this lever and its connections the dogf may be adjusted so as to engage with the teeth I) more or less, and thus vary the tam ping movement and the force of the blows of weight D, or the dogf may be turned out of range with said teeth, so that the weight will not be lifted from the rim of the roller, but will remain in contact therewith.

The operation of the roller will be apparent to those familiar with devices of this class. It will be seen that to the usual uniform smoothing action of the roller upon the material over which it passes a tamping actionis added, by which energy or work is imparted through the rim of the roller to the material acted upon. In consequence of this arrange ment the machine has a much higher efficiency than ordinary rollers of like or greater weight. The effect of the roller penetrates much deeper into the rolled material, and hard lumps or projections which would not ordinarily be affected by a simple roller of even greater weight than my machine will be crushed and leveled by the tamping action of the weight. The force of the blows imparted by the tampiug-weight is easily varied and adjusted according to the condition of the material or surface operated upon, or the tamping action can he altogether discontinued whenever it is desirable to do so. Even without the tamping action the roller provided with a rotary Weight adapted to traverse the interior of its rim opposite its bearing-surface facilitates the operation of the roller and renders it more effective with a given weight for simple mechanical reasons which will be readily appreciated by those familiar with the art to which my invention pertains.

I do not wish to be understood as limiting myself to the details of construction for the purpose herein shown and described, as they may be variously modified, according to the use to which the device is to be applied, within the intended scope of my invention, and in this connection I desire to call attention to the fact that the tamping mechanism can be easily made and arranged to be operated independently of the turning movement of the rolleras, for instance, by steam; also, that the shape of the tamping-weight is not an essential feature of the machine, but may be made in the form of a hammer of any convenient or suitable shape.

I claim 1. The combination with a hollow roller of a weight contained in said roller-and arranged to strike against its rim and produce a tamping action upon the ground or surface over which the roller passes, substantially as and for the purposes set forth.

2. The combination with a hollow roller, of a vertically-movable weight contained there-- in, and means of alternately lifting and drop- .ping said Weight against the working side of said roller, substantially as and for the purposes set forth.

3. The combination with a hollow roller, of a tamping-weight contained therein and arranged to impart blows thereto, and means of regulating the force of said blows, sub stantially as and for the purposes set forth.

4. The combination with a hollow roller, of a rotary cylindrical weight contained therein, and having its axis substantially parallel therewith, and means of alternately lifting and dropping said weight, substantially as and for the purposes set forth.

5. The combination with a hollow roller, of

a rolling weight guided therein with its axis parallel with the axis of the roller, means of alternately lifting and dropping said weight, and means of varying the distance that the weight is lifted, substantially as and for the purposes set forth.

6. The combination of a hollow roller and a rotary cylindrical weight adapted to impart blows against the interior thereof and provided with a covering of elastic or non-resonant material, substantially as and for the purposes set forth.

7. The combination with a suitable frame, of a hollow roller journaled therein, a support pivotally connected with said frame, a weight attached to said support inside of the roller, and teeth or projections on the inside of said roller arranged toengage with said support and alternately lift and drop said weight when the roller is turned, substantially as and for the purposes set forth.

8. The combination with a suitable frame, of a hollow roller journaled therein and provided inside with teeth or projections, a support pivotallyconnected with said frame, a weight attached to said support opposite the working side of the roller, and a dog adjustably connected with said support so as to engage more or less with said teeth or projections, substantially as and for the purposes set forth.

9. The combination with a suitable frame, of a hollow roller journaled therein and provided inside with a circular series of teeth or projections, a support pivotally connected with said frame, a weight attached to said my own I affix my signatiire in presence of support within said roller, a dog pivotally two Witnesses.

connected with said support and means of projecting said dog more or less into the path MAX SOHINKE' 5 of said teeth, substantially as and for the pur- Witnesses:

poses set forth. M. L. EMERY,

In testimony that I claim the foregoing as CHAS. L. GOSS. 

